Five experts were asked what it means to personalize learning for students and what role professional learning should play in these efforts. Reflective of the diversity in the field today, their responses reveal both commonalities and notable differences (for example, some see technology as central, while others believe personalization can happen without any technology at all). But all agreed on the importance of building educators' capacity through high-quality professional learning. The following experts present their opinions in this article: (1) Susan Patrick, President and CEO, iNACOL and co-founder, CompetencyWorks; (2) Erin Figula, Director of professional learning, LEAP Innovations; (3) Jennifer Sublette, Director of professional learning, Albemarle County Public Schools, Charlottesville, VA; (4) Betheny Gross, Associate director, Center on Reinventing Public Education, University of Washington Bothell; and (5) Nirvani Budhram, Senior program officer, Robin Hood Learning + Technology Fund, The Robin Hood Foundation.